1 #
2 # Snippets from http://landley.net/notes.html
3 #
4 # Usage:
5 # test/toysh.sh
6
7 #### @Q
8 # http://landley.net/notes.html#24-06-2020
9
10 # Fix these
11 case $SH in (dash|mksh|zsh) exit ;; esac
12
13 xx() { echo "${*@Q}";}; xx a b c d
14 xx() { echo "${@@Q}";}; xx a b c d
15 ## STDOUT:
16 'a' 'b' 'c' 'd'
17 'a' 'b' 'c' 'd'
18 ## END
19 ## OK osh STDOUT:
20 a b c d
21 a b c d
22 ## END
23 ## N-I dash/mksh/zsh stdout-json: ""
24
25 #### extglob $IFS 1
26 rm * # setup
27 # http://landley.net/notes.html#12-06-2020
28 shopt -s extglob
29
30 touch abc\)d
31 echo ab+(c?d)
32
33 IFS=c ABC="c?d"
34 echo ab+($ABC)
35
36 ABC='*'
37 echo $ABC
38
39 ## STDOUT:
40 abc)d
41 ab+( ?d)
42 _tmp abc)d
43 ## END
44 ## OK mksh STDOUT:
45 abc)d
46 ab+( ?d)
47 _tmp abc)d
48 ## END
49
50 #### extglob $IFS 2
51 # http://landley.net/notes.html#17-05-2020
52
53 shopt -s extglob # required for bash, not osh
54 IFS=x; ABC=cxd; for i in +($ABC); do echo =$i=; done
55
56 ## STDOUT:
57 =+(c=
58 =d)=
59 ## END
60
61 #### char class / extglob
62 # http://landley.net/notes.html#14-05-2020
63 shopt -s extglob
64
65 rm *
66
67 touch l; echo [hello"]"
68
69 touch b
70 echo [$(echo abc)]
71
72 touch +
73 echo [+()]
74 echo [+(])
75 ## STDOUT:
76 [hello]
77 b
78 +
79 [+(])
80 ## END
81 ## BUG mksh STDOUT:
82 [hello]
83 b
84 [+()]
85 [+(])
86 ## END
87
88 #### patsub of $* - http://landley.net/notes.html#23-04-2020
89 chicken() { echo ${*/b c/ghi}; }; chicken a b c d
90 ## STDOUT:
91 a b c d
92 ## END
93 ## BUG mksh stdout-json: ""
94 ## BUG mksh status: 1
95
96
97 #### Brace Expansion (known difference)
98 # http://landley.net/notes.html#04-01-2020
99
100 HOME=/home/foo
101
102 echo {~,~root}/pwd
103 echo \{~,~root}/pwd
104 echo ""{~,~root}/pwd
105
106 ## STDOUT:
107 ~/pwd ~root/pwd
108 {~,~root}/pwd
109 ~/pwd ~root/pwd
110 ## END
111 ## OK bash STDOUT:
112 /home/foo/pwd /root/pwd
113 {~,~root}/pwd
114 ~/pwd ~root/pwd
115 ## END
116
117 #### {abc}<<< - http://landley.net/notes-2019.html#09-12-2019
118 { echo; } {abc}<<< walrus
119 cat <&$abc
120 ## STDOUT:
121
122 walrus
123 ## END
124 ## N-I mksh stdout-json: ""
125 ## N-I mksh status: 1
126
127 #### slice of @ and @ - http://landley.net/notes.html#23-04-2020
128 IFS=x; X=x; eval abc=a${X}b
129
130 chicken() { for i in "${@:3:5}"; do echo =$i=; done; } ; chicken ab cd ef gh ij kl mn op qr
131
132 chicken() { for i in "${*:3:5}"; do echo =$i=; done; } ; chicken ab cd ef gh ij kl mn op qr
133
134 ## STDOUT:
135 =ef=
136 =gh=
137 =ij=
138 =kl=
139 =mn=
140 =ef gh ij kl mn=
141 ## END
142 ## N-I mksh stdout-json: ""
143 ## N-I mksh status: 1
144